Oxygen minimum zone cryptic sulfur cycling sustained by offshore transport of key sulfur oxidizing bacteria

• DOI: 10.1038/s41467-018-04041-x
• Publication Date: 2018-04-24T14:29:59Z
• Authors: Cameron M. Callbeck; Gaute Lavik; Timothy G. Ferdelman; Bernhard Fuchs; Harald R. Gruber-...; Philipp F. Hach; Sten Littmann; Niels J. Schoffelen; Tim Kalvelage; Sören Thomsen; Harald Schunck; Carolin R. Löscher; Ruth A. Schmitz; Marcel M. M. Kuypers
• Keywords: Oxygen minimum zone; Sulfur Cycle; Chemocline; Biogeochemical Cycle

Members of the gammaproteobacterial clade SUP05 couple water column sulfide oxidation to nitrate reduction in sulfidic oxygen minimum zones (OMZs). Their abundance offshore OMZ waters devoid detectable has led suggestion that local sulfate fuels SUP05-mediated a so-called "cryptic sulfur cycle". We examined distribution and metabolic capacity Peru Upwelling waters, using combination oceanographic, molecular, biogeochemical single-cell techniques. A single species, U Thioglobus perditus, was found be abundant active both shelf sulfide-free waters. Our combined data indicated mesoscale eddy-driven transport dispersal T. perditus elemental from into region. This provides an alternative explanation for activity sulfide-oxidizing denitrifying bacteria sulfide-poor